Disable zoom to data when no active source

This disabled to zoom to data button when there is no
active source.

Change-Id: I8b2f6c2a5befc1b400a602efda00d315cb1eb810
Merge topic 'zoom-to-data-icon' into next

3ea6cd5 Disable zoom to data when no active source
Remove deprecated ParaViewWeb examples

Change-Id: I0bf1fc3aacb65e96ae8e442e8cc195fab7b1fa4f
Merge topic 'pvw-remove-example' into next

7755034 Remove deprecated ParaViewWeb examples